Well, it takes one pass all the way to the reducers to get the small matrix with which the SVD will be computed, so I'm not sure how you'd project the original data onto that SVD in the same pass...
I guess if you mean just do a random projection on the original data, you can certainly do that in one pass, but that's random projection, not a stochastic decomposition. -jake On Mon, Mar 22, 2010 at 5:54 PM, Ted Dunning <ted.dunn...@gmail.com> wrote: > It may also be possible to get by with only one MR pass if you only need to > compute reduced dimensional representations for new data. > > On Mon, Mar 22, 2010 at 4:38 PM, Jake Mannix <jake.man...@gmail.com> > wrote: > > > If you could help get MAHOUT-228 finished and put in trunk, we could > > quickly move forward on MAHOUT-309. I think this can be done in > > possibly only 2 MR passes, but we can chat about that a bit more > > as we dig into it. :) > > >
